package com.itheima.reggie.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Set;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    DishService dishService;

    @Autowired
    SetmealService setmealService;

    /**
     * 根据id删除,并判断
     *
     * @param id
     */
    @Override
    public void remove(Long id) {
//添加查询条件，根据分类id进行查询菜品数据
        //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(lambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if (count1 > 0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
       LambdaQueryWrapper<Setmeal> lambdaQueryWrapper2 = new LambdaQueryWrapper<>();
        lambdaQueryWrapper2.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(lambdaQueryWrapper2);
        if (count2 >0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }

        //没有关联其他菜品和套餐直接进行删除
        super.removeById(id);

    }
}
